US9967323B2 - Message distribution system, distribution sequence determination device, distribution sequence determination method, and distribution sequence determination program - Google Patents

Message distribution system, distribution sequence determination device, distribution sequence determination method, and distribution sequence determination program Download PDF

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Publication number
US9967323B2
US9967323B2 US14/758,429 US201314758429A US9967323B2 US 9967323 B2 US9967323 B2 US 9967323B2 US 201314758429 A US201314758429 A US 201314758429A US 9967323 B2 US9967323 B2 US 9967323B2
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communication
state
terminal
mobile terminal
distribution
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US20150334175A1 (en
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Takahiro Shiroshima
Takeo Onishi
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NEC Corp
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NEC Corp
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/10—Protocols in which an application is distributed across nodes in the network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/24—Traffic characterised by specific attributes, e.g. priority or QoS
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/70—Admission control; Resource allocation
    • H04L47/74—Admission control; Resource allocation measures in reaction to resource unavailability
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/70—Admission control; Resource allocation
    • H04L47/82—Miscellaneous aspects
    • H04L47/822—Collecting or measuring resource availability data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/27—Transitions between radio resource control [RRC] states
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/28—Discontinuous transmission [DTX]; Discontinuous reception [DRX]

Definitions

  • the present invention relates to a message distribution system for distributing a message, a distribution sequence determination device, a distribution sequence determination method, and a distribution sequence determination program.
  • patent literature 1 An example of the control method relating to RRC is disclosed in patent literature 1.
  • a state is set to a state wherein low speed communication is possible and only while packets are frequently received, a state is set to a state wherein high speed communication is possible.
  • the state is changed from the state wherein low speed communication is possible to a temporarily stopped state.
  • the power consumption can be reduced compared to a case in which the state wherein high speed communication is possible is always maintained.
  • the state can be changed to the state wherein high speed communication is possible if needed, data can be received instantaneously.
  • the RRC state is controlled in such a way and the power consumption of the communication terminal is suppressed totally.
  • the RRC state at the time of packet reception is standardized as follows (refer to non-patent literature 1 and non-patent literature 2).
  • a CELL_DCH (dedicate carrier channel) is allocated to a state wherein high-speed communication is possible
  • a CELL_FACH forward direction access channel
  • a CELL_PCH (paging channel) and a UTRA_Idle (Idle) are allocated to a temporarily stopped state.
  • the power consumption decreases in an order of DCH>FACH>PCH>Idle.
  • an RRC CONNECTED connection state, CONN
  • an RRC IDLE Idle
  • the power consumption decreases in an order of CONN>Idle.
  • either communication based on LTE or communication based on WCDMA (HSPA) is selected on the basis of a type of a mobile network to which the mobile terminal is connected and circumstances of the moment. Further, in the communication based on these communication standards, the mobile terminal in the temporarily stopped state receives data has to change the state to the state wherein high speed communication is possible or the state wherein low speed communication is possible from the temporarily stopped state.
  • non communication transition preparation period a period required for changing the state from the state wherein communication is possible to the temporarily stopped state.
  • the “non communication transition preparation period” may be generally called as the “inactivity timer length”.
  • the pull type communication in which a WWW server on the internet starts to communicate (mainly download) with the terminal by a trigger from the terminal is used.
  • the service provider's service server on the internet starts to communicate (mainly download) with the terminal by a trigger of a service server side.
  • the push type communication is different in this point from the pull type communication.
  • the push type communication is individually installed for each application which provides a service.
  • a general-purpose infrastructure is built as the push service.
  • a push server or a server called a push proxy gateway (hereinafter, referred to as a “push server” including these servers) is installed in the network of the push provider.
  • the push server receives a push request including a message (push message) to be pushed from the service provider and distributes the message to the mobile terminal on behalf of the service provider.
  • An object of the technology described in patent literature 2 is to safely manage an identifier given to a portable terminal device in an information distribution system using a push notification service.
  • the identifier given to the portable terminal device is prevented from being leaked or made known by encrypting information in communication between the push server and the Web server included in the information distribution system.
  • the power consumption of the mobile terminal can be suppressed by using the technology of controlling the RRC state mentioned above. Further, the push message can be distributed to the mobile terminal by installing the technology such as the above mentioned push server or the like.
  • the RRC state of the mobile terminal has to be set to the state wherein communication is possible before performing the distribution. Accordingly, the following problem occurs. Namely, the state of the terminal whose RRC state is the temporarily stopped state has to be changed from the temporarily stopped state to the state wherein communication is possible as a preparation for receiving a push message. Accordingly, a waiting time is generated after the start of transmission of the push message by the push server until the push message is received by the terminal. Further, the mobile terminal whose RRC state is the state wherein communication is possible can receive the push message immediately when the push server starts to transmit the push message.
  • the push server When the push server receives the requests at the same time for the distribution of the push message to a plurality of mobile terminals from one or a plurality of service providers, the above-mentioned waiting time may be generated plural times. This case will be described by using a specific example. In this example, it is assumed that the push server receives the request for the distribution of the push message to a first mobile terminal and the request for the distribution of the push message to a second mobile terminal from a plurality of service providers at the same time. Further, it is assumed that the current state of the first mobile terminal is the temporarily stopped state. Further, it is assumed that the current state of the second mobile terminal is the state wherein communication is possible.
  • the push server determines a distribution sequence in which first, the push message is distributed to the first mobile terminal and then the push message is distributed to the second mobile terminal.
  • the distribution of the push message to the second mobile terminal that is performed later is kept waiting until the distribution of the push message to the first mobile terminal is completed after the state of the first mobile terminal is changed to the state wherein communication is possible.
  • the state of the second mobile terminal is changed from the state wherein communication is possible to the temporarily stopped state. Accordingly, in order to perform the push distribution to the second mobile terminal after the distribution of the push message to the first mobile terminal is completed, the state of the second terminal has to be changed to the state wherein communication is possible from the temporarily stopped state again. This results in the increase of the distribution time. As mentioned above, in order to change the state from the temporarily stopped state to the state wherein communication is possible, a predetermined time required for the negotiation and the like are needed.
  • the waiting time it takes not only “the time required for changing the state of the first mobile terminal from the temporarily stopped state to the state wherein communication is possible” but also “the time required for changing the state of the second mobile terminal from the temporarily stopped state to the state wherein communication is possible again”.
  • the time required for changing the state of the second mobile terminal from the temporarily stopped state to the state wherein communication is possible is the time which is not included in the waiting time if the distribution to the second mobile terminal is performed first.
  • the time required for changing the state of the first mobile terminal from the temporarily stopped state to the state wherein communication is possible may be eliminated if the distribution to the second mobile terminal is performed first. This is because there is a possibility that if the first mobile terminal performs any communication other than the push message distribution during the distribution to the second mobile terminal, the state of the first terminal is changed or just changing to the state wherein communication is possible at the time of distributing the push message.
  • an object of the present invention is to provide a message distribution system which can reduce wasteful delays occurring when a mobile terminal whose RRC state is the state wherein communication is possible transfer in the temporarily stopped state, a distribution sequence determination device, a distribution sequence determination method, and a distribution sequence determination program.
  • a distribution sequence determination device which determines a distribution sequence for a push message transmitted to each of a plurality of terminals and is characterized in that on the basis of whether each of a plurality of the terminals is in a state wherein communication is possible or in a temporarily stopped state, the distribution sequence is determined so as to transmit the push message to each of a plurality of the terminals in the distribution sequence in which the terminal in the state wherein communication is possible is given priority over the terminal in the temporarily stopped state is provided.
  • a message distribution system which includes a distribution sequence determination device and a network device and is characterized in that the distribution sequence determination device is the distribution sequence determination device provided by the above-mentioned first aspect of the present invention and the network device distributes a push message to a terminal according to a distribution sequence determined by the distribution sequence determination device is provided.
  • a distribution sequence determination method which is used by a device for determining a distribution sequence for a push message transmitted to each of a plurality of terminals and is characterized in that on the basis of whether each of a plurality of the terminals is in a state wherein communication is possible or in a temporarily stopped state, the distribution sequence is determined so as to transmit the push message to each of a plurality of the terminals in the distribution sequence in which the terminal in the state wherein communication is possible is given priority over the terminal in the temporarily stopped state is provided.
  • a distribution sequence determination program which causes a computer to function as a distribution sequence determination device which determines a distribution sequence for a push message transmitted to each of a plurality of terminals and is characterized in that the distribution sequence determination program causes the computer to function as the distribution sequence determination device which determines the distribution sequence, on the basis of whether each of a plurality of the terminals is in a state wherein communication is possible or in a temporarily stopped state, so as to transmit the push message to each of a plurality of the terminals in the distribution sequence in which the terminal in the state wherein communication is possible is given priority over the terminal in the temporarily stopped state is provided.
  • wasteful delays occurring when a mobile terminal whose RRC state is the state wherein communication is possible transfer in the temporarily stopped state can be reduced.
  • FIG. 1 is a functional block diagram showing a basic configuration of a first exemplary embodiment of the present invention
  • FIG. 2 is a flowchart showing a basic operation for controlling a distribution sequence for a push message in each exemplary embodiment of the present invention
  • FIG. 3 is a conceptual rendering showing a distribution sequence for a push message as a queue in each exemplary embodiment of the present invention
  • FIG. 4 is a flowchart showing a basic operation for distributing a push message to a mobile terminal in each exemplary embodiment of the present invention
  • FIG. 5 is a functional block diagram showing a basic configuration of a second exemplary embodiment of the present invention.
  • FIG. 6 is a flowchart showing a basic operation of estimating an RRC state of a mobile terminal by a terminal state estimation unit in a second exemplary embodiment of the present invention.
  • this exemplary embodiment includes a plurality of mobile terminals 10 , one or more service servers 20 , a push server 30 , and a network device 40 .
  • the network device 40 is connected to each mobile terminal 10 by a wireless communication network (not shown).
  • this wireless communication network is realized on the basis of a wireless communication system in which the RRC state can be changed.
  • the push server 30 is connected to the service server 20 and the network device 40 by a wired network or a wireless network (not shown).
  • This network can be realized on the basis of an arbitrary standard.
  • the network may be realized by a dedicated line or a public network such as the internet or the like. Further, in this exemplary embodiment, it is assumed that the push server 30 is connected to the service server 20 and the network device 40 by the wired network.
  • the mobile terminal 10 is a terminal which is carried and directly operated by a user.
  • the service server 20 is a server which provides a service to the user in cooperation with the mobile terminal 10 .
  • the push server 30 is a server which relays the push message that is distributed to the mobile terminal 10 from the service server 20 .
  • the network device 40 is a device which transmits a message distribution request received from the push server 30 to the mobile terminal 10 via the wireless network.
  • FIG. 1 two mobile terminals 10 are shown.
  • the number of the mobile terminals 10 is not limited to this number.
  • the number of the mobile terminals 10 is arbitrarily determined.
  • the number of the service servers 20 , the number of the push servers 30 , and the number of the network devices 40 are arbitrarily determined.
  • Each server may be realized as an independent server device.
  • one server device may have a function to realize a plurality of severs.
  • a plurality of servers may cooperate with each other to realize the function of one server.
  • a configuration shown in FIG. 1 is shown as an example. Therefore, the configuration of this exemplary embodiment is not limited to the configuration shown in FIG. 1 .
  • the mobile terminal 10 includes a terminal communication unit 11 , a wireless state setting unit 12 , a terminal application providing unit 13 , and a push reception unit 14 .
  • the terminal communication unit 11 is a unit which transmits/receives data to/from the push server 30 . Specifically, the terminal communication unit 11 transmits/receives the data to/from the push server 30 via the network device 40 . In this communication, the terminal communication unit 11 communicates with the network device 40 via the wireless network.
  • the wireless state setting unit 12 grasps a communication frequency of the mobile terminal 10 by monitoring the terminal communication unit 11 .
  • the wireless state setting unit 12 sets the RRC state to the terminal communication unit 11 on the basis of the grasped communication frequency of the mobile terminal 10 or an instruction from the network device 40 .
  • As the RRC state to be set for example, a high-speed communication state, a low-speed communication state, a temporarily stopped state, or the like are used.
  • the terminal application providing unit 13 is an application which provides a service to the user actually. Application software and hardware operate in cooperation with each other and whereby, the terminal application providing unit 13 is realized.
  • one terminal application providing unit 13 is included in the mobile terminal 10 .
  • a plurality of different terminal application providing units 13 may be included in the mobile terminal 10 .
  • a plurality of different application software may be installed in the mobile terminal 10 .
  • the push reception unit 14 distributes this push message to the terminal application providing unit 13 specified by this push message.
  • the service server 20 includes a service server function unit 21 which is a unit which causes the server device to function as a service server.
  • the service server function unit 21 operates in cooperation with the terminal application providing unit 13 operating on the mobile terminal 10 and provides the service to the user.
  • the program for realizing the service server operates in cooperation with the server device and whereby, the service server function unit 21 is realized.
  • the push server 30 includes a push distribution unit 31 , a distribution sequence control unit 32 , a terminal state determination unit 33 , and a server communication unit 34 .
  • the push distribution unit 31 receives a request for the distribution of the push message to the mobile terminal 10 from the service server function unit 21 .
  • the push distribution unit 31 identifies the mobile terminal 10 specified by the distribution request and requests the distribution sequence control unit 32 to distribute the push message to the identified mobile terminal 10 .
  • the mobile terminal 10 specified by the distribution request is appropriately called a “distribution destination mobile terminal 10 ”.
  • the distribution sequence control unit 32 distributes the push message to the distribution destination mobile terminal 10 according to the request from the push distribution unit 31 .
  • the distribution sequence control unit 32 does not merely distribute the push message according to the order of the requests.
  • the distribution sequence control unit 32 controls the distribution sequence for the push message according to the RRC state of the distribution destination mobile terminal 10 .
  • the method for controlling the distribution sequence used in the distribution sequence control unit 32 will be specifically described later.
  • the terminal state determination unit 33 acquires information of the RRC state of the mobile terminal 10 in cooperation with the network device 40 .
  • the terminal state determination unit 33 sends the acquired information of the RRC state to the distribution sequence control unit 32 .
  • the server communication unit 34 transmits the push message to the distribution destination mobile terminal 10 via the network device 40 in the sequence determined by the distribution sequence control unit 32 .
  • the network device 40 includes a wireless communication unit 41 , a terminal wireless state control unit 42 , and a terminal wireless state reporting unit 43 .
  • the wireless communication unit 41 is a unit which relays communication between a server device group (the push server 30 and the service server 20 ) connected by the wired network and the mobile terminals 10 connected by the wireless network. Specifically, the wireless communication unit 41 converts the data transmitted by the server device group into data for the wireless communication network and transmits it to the mobile terminal 10 . The wireless communication unit 41 converts the data transmitted by the mobile terminal 10 into data for the wired communication network and transmits it to the server device group.
  • the terminal wireless state control unit 42 monitors the state of the wireless communication to each mobile terminal 10 .
  • the terminal wireless state control unit 42 changes the RRC state of the target mobile terminal 10 .
  • the terminal wireless state control unit 42 communicates with the wireless state setting unit 12 of the target mobile terminal 10 and changes the RRC state of the mobile terminal 10 .
  • the terminal wireless state reporting unit 43 receives a search request about the RRC state of the mobile terminal 10 specified by the terminal state determination unit 33 of the push server 30 .
  • the terminal wireless state reporting unit 43 transmits information of the RRC state of the specified mobile terminal 10 to the terminal state determination unit 33 of the push server 30 as a reply.
  • each function block of this exemplary embodiment has been explained above in detail. Further, for convenience of explanation, only the function block related to this exemplary embodiment is shown in FIG. 1 . Namely, this does not intend to prohibit the use of the function block other than the function block shown in FIG. 1 .
  • Each function block shown in FIG. 1 may be used for only the operation unique to this exemplary embodiment. However, each function block can be used for another use as a general-purpose function block.
  • various types of the terminal application providing units 13 and the processes operate on the mobile terminal 10 although these units and processes are not shown in FIG. 1 . Each of these applications and processes performs communication by using the terminal communication unit 11 at an arbitrary timing.
  • the network device 40 uses a function other than the function provided by the function block shown in FIG. 1 or the like with a part of the function provided by the function block or without the function provided by the function block and whereby, the network device 40 is connected to various servers other than the push server 30 and the wired network and communicates with the mobile terminal 10 at the arbitrary timing.
  • the wireless state setting unit 12 of the mobile terminal 10 and the terminal wireless state control unit 42 of the network device 40 monitor the wireless communication state in each mobile terminal 10 at a time other than the time for distributing the push message.
  • the terminal wireless state control unit 42 changes the RRC state of the target mobile terminal 10 to the temporarily stopped state. Namely, in a case in which the push message is not distributed for a predetermined time but the mobile terminal 10 communicates with another mobile terminal by wireless communication, the RRC state of the mobile terminal 10 may not be changed to the temporarily stopped state.
  • the RRC state of the mobile terminal 10 is the temporarily stopped state, the RRC state is changed to the high-speed communication state or the low-speed communication state. Further, the mechanism for changing the RRC state is described in non-patent literature 1 and non-patent literature 2 and known by the person skilled in the art. Therefore, the detailed description will be omitted here.
  • FIG. 1 a functional block diagram shown in FIG. 1 and a flowchart shown in FIG. 2 and FIG. 4 .
  • a service server function unit 21 transmits a request for the distribution of the push message to the specified mobile terminal 10 (it corresponds to the distribution destination mobile terminal 10 ) to the push server 30 at an arbitrary timing.
  • This timing is determined by a content of the service provided by the service server function unit 21 .
  • This will be explained by taking a case in which the service server function unit 21 provides a chat service as an example.
  • the service server function unit 21 receives a chat message to a certain user's mobile terminal 10
  • the distribution of the push message is performed at a timing at which information indicating the reception of the chat message is transmitted to the certain user's mobile terminal 10 .
  • One distribution destination mobile terminal 10 may be used or a plurality the distribution destination mobile terminals 10 may be used. Namely, as the distribution destination of one push message, only one mobile terminal 10 may be specified or a plurality of the mobile terminals 10 may be specified. For example, in a case in which three or more persons in one group just use chat messaging, the chat message created by one user in the group is distributed to the mobile terminals 10 of two users other than the user who creates the chat message in the group as the push message.
  • an arbitrary ID character string may be used or information such as an IP address (Internet Protocol address) or the like that is specified in the network may be used.
  • the push distribution unit 31 of the push server 30 receives the push message distribution request (Step S 101 ), it identifies the distribution destination mobile terminal 10 on the basis of the information for identifying the distribution destination mobile terminal 10 specified by the distribution request (Step S 102 ). Next, the push distribution unit 31 associates the identified distribution destination mobile terminal 10 with the push message and sends them to the distribution sequence control unit 32 .
  • the distribution sequence control unit 32 makes an inquiry about the RRC state of the distribution destination mobile terminal 10 to the terminal state determination unit 33 , receives the answer, and thereby, acquires information of the RRC state of the distribution destination mobile terminal 10 (Step S 103 ).
  • step S 103 the terminal state determination unit 33 receives an inquiry about the RRC state of the distribution destination mobile terminal 10 from the distribution sequence control unit 32 .
  • the distribution sequence control unit 32 which receives the inquiry identifies the network device 40 that manages the distribution destination mobile terminal 10 . Further, in order to identify the network device 40 , the inquiry about whether or not to manage the distribution destination mobile terminal 10 may be made to each network device 40 or communication with each network device 40 may be periodically performed to grasp the network device 40 which manages the mobile terminal 10 .
  • the distribution sequence control unit 32 makes an inquiry about the RRC state of the distribution destination mobile terminal 10 to the terminal wireless state reporting unit 43 included in the identified network device 40 .
  • the terminal wireless state reporting unit 43 of the network device 40 which receives the inquiry acquires information of the RRC state of the distribution destination mobile terminal 10 from the terminal wireless state control unit 42 and sends it to the terminal state determination unit 33 as a reply. Further, the terminal state determination unit 33 sends information of the RRC state of the distribution destination mobile terminal 10 to the distribution sequence control unit 32 as a reply. As a result, the distribution sequence control unit 32 can acquire information of the RRC state of the distribution destination mobile terminal 10 .
  • the terminal wireless state control unit 42 of the network device 40 communicates with the wireless state setting unit 12 of the mobile terminal 10 and always grasps the RRC state of the mobile terminal 10 .
  • step S 103 information of the RRC state of the distribution destination mobile terminal 10 can be acquired.
  • a content of the acquired information is different for each type of the wireless communication network and the communication standard to which the wireless communication network conforms.
  • the state wherein communication is possible can be further divided into two or more states: for example, “a state wherein high speed communication is possible” and “a state wherein low speed communication is possible”.
  • the state wherein communication is possible is not further divided.
  • the “allowable no communication period” is a period of time from a current time to an end time of a no communication state at which the state is changed from a current state that is the “state wherein communication is possible” to the temporarily stopped state. For example, in a case in which the current state is “the state wherein communication is possible” and the “allowable no communication period” is 5 seconds, at the present time, the communication with the distribution destination mobile terminal 10 can be achieved.
  • the “allowable no communication period” is reduced every moment and when the “allowable no communication period” is reduced to zero, the state of the distribution destination mobile terminal is changed to the “temporarily stopped state” and the communication cannot be immediately performed.
  • this allowable no communication period is reset to a predetermined length. This predetermined length corresponds to the non communication transition preparation period described in the background art.
  • the allowable no communication period is calculated by a formula of: “non communication transition preparation period—period of time elapsed after last packet transmission/reception”.
  • step S 104 the distribution sequence control unit 32 confirms whether the acquired RCC state of the distribution destination mobile terminal 10 is the “state wherein communication is possible” or the “temporarily stopped state” (Step S 104 ).
  • the distribution sequence control unit 32 instructs the server communication unit 34 to distribute the push message to the distribution destination mobile terminal 10 that is a current sequence determination target after the distribution of another push message that is currently kept waiting for distribution (Step S 105 ). This because it makes no sense to try to transmit the push message to the distribution destination mobile terminal 10 in the “temporarily stopped state” because the transmission cannot be performed and efficiency is improved when another push messages is transmitted before the push message to such distribution destination mobile terminal 10 is transmitted.
  • step S 104 When the RRC state of the distribution destination mobile terminal 10 is the “state wherein communication is possible” (“Yes” in step S 104 ), the distribution sequence control unit 32 performs a process of step S 106 .
  • step S 106 the distribution sequence control unit 32 confirms whether or not information of the “allowable no communication period” can be acquired as information of the RCC state (Step S 106 ).
  • the distribution sequence control unit 32 when the distribution sequence control unit 32 can acquire only the information about whether the RRC state of the distribution destination mobile terminal 10 is the “state wherein communication is possible” or the “temporarily stopped state” and cannot acquire information of the “allowable no communication period” as information of the RRC state (“No” in step S 106 ), the process proceeds to step S 107 .
  • the distribution sequence control unit 32 instructs the server communication unit 34 to distribute the push message to the distribution destination mobile terminal 10 that is the current sequence determination target before distributing the push message to another distribution destination mobile terminal 10 in the “temporarily stopped state” (Step S 107 ).
  • the distribution sequence control unit 32 when the distribution sequence control unit 32 can acquire the information of the “allowable no communication period” in addition to the information about whether the RRC state of the distribution destination mobile terminal 10 is the “state wherein communication is possible” or the “temporarily stopped state”, as information of the RRC state (“Yes” in step S 106 ), the process proceeds to step S 108 .
  • the distribution sequence control unit 32 instructs the server communication unit 34 to distribute the push message to the mobile terminal 10 that is the current sequence determination target before distributing the push message to the following two types of the distribution destination mobile terminals 10 (Step S 108 ),
  • the instruction to distribute the push message to the mobile terminal 10 that is the current sequence determination target is issued after the instruction to distribute the push message to another mobile terminal 10 whose state is the “state wherein communication is possible” and whose allowable no communication period is equal to or shorter than that of the distribution destination mobile terminal 10 that is the current sequence determination target.
  • FIG. 3 shows a queue 300 in which the distribution sequence for the push message is represented as a queue.
  • an early distributed message is located at a position lower than a position at which a late distributed message is located. Namely, the push message located at the lowest position is distributed first and the push message located at the top position is distributed last.
  • the push message with high priority is located at a position lower than a position at which the push message with low priority is located.
  • the push message distributed to the distribution destination mobile terminal 10 in the state wherein communication is possible is located at a position lower than a position at which the push message distributed to the distribution destination mobile terminal 10 in the temporarily stopped state is located.
  • a position lower than a position at which the push message distributed to the distribution destination mobile terminal 10 in the temporarily stopped state is located.
  • FIG. 3 one example is shown in FIG. 3 . Therefore, a case in which all the distribution destination mobile terminals 10 are in the temporarily stopped state or a case in which all the distribution destination mobile terminals 10 are in the state wherein communication is possible may occur.
  • the allowable no communication period is represented by “ ⁇ T”.
  • the push message distributed to the distribution destination mobile terminal 10 whose allowable no communication period ⁇ T is short is located at a position lower than a position at which the push message distributed to the distribution destination mobile terminal 10 whose allowable no communication period ⁇ T is large is located.
  • step S 104 a determination of “No” is made in step S 104 and the process proceeds to step S 105 will be described.
  • the push message that is the current sequence determination target is distributed after another push message (regardless of whether the state of the distribution destination mobile terminal 10 is the temporarily stopped state or the state wherein communication is possible) is distributed. Therefore, the push message that is the current sequence determination target is located at the last of the queue 300 as shown as a push message 301 .
  • step S 104 a determination of “Yes” is made in step S 104
  • step S 106 a determination of “No” is made in step S 106
  • step S 107 the push message that is the current sequence determination target is distributed before all the other push messages (regardless of whether the state of the distribution destination mobile terminal 10 is the temporarily stopped state or the state wherein communication is possible) are distributed. Therefore, the push message that is the current sequence determination target is located at the head of the queue 300 as shown as a push message 302 .
  • step S 104 a determination of “Yes” is made in step S 104
  • step S 106 a determination of “Yes” is made in step S 106
  • step S 108 the push message that is the current sequence determination target is distributed before distributing the push message to the following two types of the distribution destination mobile terminals 10 .
  • the push message distributed to the mobile terminal 10 that is the current sequence determination target is located at a position that is lower than a position at which the push message distributed to the mobile terminal 10 in the temporarily stopped state is located, lower than a position at which the push message distributed to the mobile terminal 10 whose allowable no communication period is ⁇ T 2 (> ⁇ T 1 ) is located, and upper than a position at which the push message distributed to the mobile terminal 10 whose allowable no communication period is ⁇ T 3 ( ⁇ T 1 ) is located. Therefore, the push message that is the current sequence determination target as a push message 303 .
  • the allowable no communication period ⁇ T at the time of determining the distribution sequence can be calculated by a formula of: “non communication transition preparation period—period of time elapsed after last packet transmission/reception” for all the push messages included in the queue 300 at a present time.
  • the process for acquiring information of the current non communication transition preparation period for all the push messages whenever the distribution sequence is determined becomes complicated. Accordingly, the current allowable no communication period ⁇ T may be calculated as follows.
  • the calculated allowable no communication period ⁇ T (it is represented by ⁇ T′) may be held and reduced according to the elapsed time. For example, when the allowable no communication period ⁇ T is counted by “seconds”, one second is subtracted from the allowable no communication periods ⁇ T′ of all the push messages included in the current queue 300 for each elapsed time of one second and the value after the subtraction may be used as the current allowable no communication period ⁇ T.
  • the allowable no communication period ⁇ T′ and the time at which the allowable no communication period ⁇ T′ is calculated may be held.
  • a time difference between a time t 1 at which the allowable no communication period ⁇ T′ is calculated and a current time t 2 is calculated and the calculated time difference may be subtracted from the allowable no communication period ⁇ T′.
  • the distribution destination mobile terminal 10 whose state is the “state wherein communication is possible” and of which the information of the allowable no communication period cannot be acquired from the terminal has the allowable no communication period of zero.
  • the value of an allowable wireless communication period of the allowable no communication period of the distribution destination mobile terminal 10 whose state is the “state wherein communication is possible” and of which the information of the allowable no communication period cannot be acquired from the terminal is set to an average allowable wireless communication period and a process similar to the process of step S 108 may be performed.
  • the push message is not treated like the push message 302
  • the average allowable wireless communication period is set to the allowable no communication period ⁇ T 1 , and then the push message may be treated like the push message 303 .
  • the average allowable wireless communication period may be an average value or the like of N allowable wireless communication periods that are acquired by the latest acquisition or a predetermined value.
  • the server communication unit 34 reads the push message in the distribution sequence specified by the distribution sequence control unit 32 and requests the network device 40 to start to communicate with the distribution destination mobile terminal 10 associated with the push message (Step S 201 ).
  • a method determined for each type of the network such as an IP network or the like is used.
  • the distribution destination mobile terminal 10 is specified by the IP address.
  • the wireless communication unit 41 of the network device 40 When the wireless communication unit 41 of the network device 40 is requested to start to communicate with the mobile terminal 10 , it requests the terminal wireless state control unit 42 to establish a communication bearer (Step S 202 ).
  • the terminal wireless state control unit 42 communicates with the wireless state setting unit 12 of the distribution destination mobile terminal 10 and establishes the communication bearer between the terminal communication unit 11 of the mobile terminal 10 and the wireless communication unit 41 of the network device 40 (Step S 203 ).
  • the RRC state of the distribution destination mobile terminal 10 is the “temporarily stopped state”, it takes much time until the RRC state is changed to the state wherein communication is possible and whereby, it takes much time until the communication bearer is established.
  • the server communication unit 34 of the push server 30 transmits the push message to the wireless communication unit 41 of the network device 40 and the network device 40 transmits the push message to the terminal communication unit 11 of the distribution destination mobile terminal 10 on the established bearer (Step S 204 ).
  • the terminal communication unit 11 sends the push message to the push reception unit 14 .
  • the push reception unit 14 refers to information for identifying the distribution destination of the push message and identifies the terminal application providing unit 13 that is the final distribution destination of the message that is described in the push message.
  • the push reception unit 14 sends the push message to the identified terminal application providing unit 13 .
  • the terminal application providing unit 13 reads a content of the push message and provides a service to the user.
  • This exemplary embodiment described above has an effect in which the delay on push distribution that occurs when the mobile terminal whose RRC state is the state wherein communication is possible transfers in the temporarily stopped state can be prevented because the distribution sequence is appropriately determined on the basis of the RRC state of the mobile terminal.
  • the first exemplary embodiment information of the RRC state of the distribution destination mobile terminal 10 is acquired from the terminal wireless state control unit 42 .
  • the RRC state of the distribution destination mobile terminal 10 is estimated on the basis of a communication history of the distribution destination mobile terminal 10 .
  • This is a difference between the first exemplary embodiment and the second exemplary embodiment. In the following explanation, the difference between the first exemplary embodiment and the second exemplary embodiment will be described mainly.
  • this exemplary embodiment includes the mobile terminal 10 , the service server 20 , the push server 30 , and the network device 40 like the first exemplary embodiment.
  • the configurations of the mobile terminal 10 and the service server 20 according to the second exemplary embodiment are the same as those according to the first exemplary embodiment. Therefore, the description of these devices will be omitted here.
  • the push server 30 includes the push distribution unit 31 , the distribution sequence control unit 32 , the server communication unit 34 , and a terminal state estimation unit 35 .
  • the push server 30 according to the second exemplary embodiment includes the terminal state estimation unit 35 and does not include the terminal state determination unit 33 included in the push server 30 according to the first exemplary embodiment.
  • the terminal state estimation unit 35 grasps the non communication transition preparation period.
  • the non communication transition preparation period is the period in which the state is changed from the state wherein communication is possible to the temporarily stopped state when no packet is received and it is set on the basis of the type of the network or the mobile terminal 10 .
  • the terminal state estimation unit 35 grasps the non communication transition preparation period based on the type of the network to which each mobile terminal 10 is connected or the mobile terminal 10 .
  • the terminal state estimation unit 35 cooperates with the network device 40 and acquires the communication history of the mobile terminal 10 .
  • the terminal state estimation unit 35 estimates the RRC state of the mobile terminal 10 on the basis of the grasped non communication transition preparation period and the communication history. A specific estimation method will be described later.
  • the terminal state estimation unit 35 estimates the RRC state. Therefore, the terminal state determination unit 33 used for acquiring information of the RRC state in the first exemplary embodiment is eliminated. Because the function block other than the above-mentioned function block of the push server 30 is the same as that of the first exemplary embodiment. Therefore, the description will be omitted.
  • the network device 40 includes the wireless communication unit 41 and the terminal wireless state control unit 42 .
  • the network device 40 according to the second exemplary embodiment does not include a terminal state reporting unit 43 and a part of the function of the wireless communication unit 41 according to the second exemplary embodiment is different from that of the wireless communication unit 41 according to the first exemplary embodiment.
  • the wireless communication unit 41 according to the second exemplary embodiment relays communication between the server device group (the push server 30 and the service server 20 ) connected by the wired network and the mobile terminals 10 connected by the wireless network.
  • This function of the wireless communication unit 41 according to the second exemplary embodiment is the same as that of the wireless communication unit 41 according to an exemplary embodiment 1.
  • the wireless communication unit 41 according to the second exemplary embodiment further has a function to notify the terminal state estimation unit 35 of information about a start time of relay of communication of the specified mobile terminal 10 .
  • the terminal state estimation unit 35 estimates the RRC state. Therefore, the terminal state reporting unit 43 used for acquiring information of the RRC state in the first exemplary embodiment is not used. Accordingly, in the exemplary embodiment 1, the terminal state determination unit 33 communicates with a terminal communication state reporting unit 43 of the network device 40 but in an exemplary embodiment 2, the terminal state estimation unit 35 communicates with the wireless communication unit 41 of the network device 40 .
  • the function block other than the above-mentioned function block of the network device 40 is the same as that of the network device 40 according to the first exemplary embodiment. Therefore, the description will be omitted.
  • steps S 101 to S 108 and steps S 201 to S 204 explained by referring to FIG. 2 and FIG. 4 in the first exemplary embodiment are also performed in the second exemplary embodiment.
  • a method for acquiring information of the RRC state of the mobile terminal 10 used in the process of step S 103 is different from that of the first exemplary embodiment.
  • the method used in the process of step S 103 will be described with reference to FIG. 6 .
  • the terminal state estimation unit 35 receives an inquiry about the RRC state of the mobile terminal 10 from the distribution sequence control unit 32 .
  • the terminal state estimation unit 35 identifies the network device 40 managing the distribution destination mobile terminal 10 (step S 103 - 1 ).
  • the terminal state estimation unit 35 makes an inquiry about time of the last communication with the distribution destination mobile terminal 10 and a type of the network to which the mobile terminal 10 is connected to the wireless communication unit 41 of the network device 40 identified in step S 103 - 1 (step S 103 - 2 ).
  • the network device 40 sends information about the time of the last communication with the distribution destination mobile terminal 10 that is obtained from the communication history of the distribution destination mobile terminal 10 managed by the wireless communication unit 41 and the type of the network to which the distribution destination mobile terminal 10 is connected as a reply.
  • the terminal state estimation unit 35 compares the type of the network to which the distribution destination mobile terminal 10 that is the current sequence determination target is connected with information of the non communication transition preparation period corresponding to the type of the network that is given to the terminal state estimation unit 35 in advance and grasps the non communication transition preparation period of the distribution destination mobile terminal 10 that is the current sequence determination target. On the one hand, the terminal state estimation unit 35 calculates a no communication elapsed period that is a value obtained by subtracting the time at which the distribution destination mobile terminal 10 that is the current sequence determination target ends the last communication from the current time. Namely, the no communication elapsed period is the period of time elapsed after the distribution destination mobile terminal 10 that is the current sequence determination target ends the last communication.
  • the terminal state estimation unit 35 compares the non communication transition preparation period with the no communication elapsed period (step S 103 - 3 ).
  • step S 103 - 4 When the no communication elapsed period is shorter than the non communication transition preparation period (“Yes” in step S 103 - 3 ), it is determined that the distribution destination mobile terminal 10 that is the current sequence determination target is in a communication state (step S 103 - 4 ). On the other hand, when the no communication elapsed period is equal to or longer than the non communication transition preparation period (“No” in step S 103 - 3 ), it is determined that the distribution destination mobile terminal 10 that is the current sequence determination target is in the temporarily stopped state (step S 103 - 5 ).
  • step S 103 - 4 and step S 103 - 5 All the determination results obtained by the processes of step S 103 - 4 and step S 103 - 5 are transmitted to the distribution sequence control unit 32 (step S 103 - 4 and step S 103 - 5 ).
  • the type of the network to which the distribution destination mobile terminal 10 that is the current sequence determination target is connected is W-CDMA and the elapsed time after the last communication of the distribution destination mobile terminal 10 that is the current sequence determination target ends is only 30 seconds.
  • the non communication transition preparation period is 1 minute and the no communication elapsed period is 30 seconds. Therefore, the no communication elapsed period is shorter than the non communication transition preparation period. Therefore, the terminal state estimation unit 35 determines that the mobile terminal 10 that is the current sequence determination target is in the state wherein communication is possible.
  • the terminal state estimation unit 35 determines that the mobile terminal 10 that is the current sequence determination target is in the temporarily stopped state.
  • the second exemplary embodiment described above has an effect in which the RRC state can be estimated on the basis of the type of the network to which the mobile terminal is connected and the last communication time of the mobile terminal. Further, in this exemplary embodiment, a value obtained by subtracting the no communication elapsed period from the non communication transition preparation period may be transmitted to the distribution sequence control unit 32 as information of the allowable no communication period. By this operation, the process of step S 108 can be performed in this exemplary embodiment.
  • step S 103 - 3 determination is made on the basis of whether or not the no communication elapsed period is shorter than the non communication transition preparation period. Further, because the push message is not distributed immediately after the determination is made, a margin period may be included in the period and this period may be used for the determination. Namely, the determination may be made on the basis of whether or not the period obtained by adding the margin period to the no communication elapsed period is shorter than the non communication transition preparation period. This margin period is determined by taking into consideration a time lag until the push message is actually distributed to the mobile terminal 10 after the process of step S 103 - 3 ends. For example, a predetermined period of 1 or less second is set as the margin period in advance.
  • the length of the non communication transition preparation period may change when not only the different type of the network but also the different type of the distribution destination mobile terminal 10 is used.
  • the non communication transition preparation period may be grasped by taking into consideration not only the type of the network but also the type of the distribution destination mobile terminal 10 in step S 103 - 2 .
  • the combination of the first exemplary embodiment and the second exemplary embodiment may be used.
  • information of the RRC state may be acquired by using the method described in the first exemplary embodiment and with respect to the other network device 40 and the mobile terminal 10 connected to the other network device 40 , information of the RRC state may be estimated by using the method described in the second exemplary embodiment.
  • each device included in the above-mentioned message distribution system can be realized by hardware, software, or combination of hardware and software.
  • the message distribution method performed by each device included in the above-mentioned message distribution system can also be realized by hardware, software, or combination of hardware and software.
  • to realize the above-mentioned device or method by software means to realize a function thereof by using a computer which reads and executes a program.
  • the program is stored in various types of non-transitory computer readable media and can be supplied to the computer.
  • the non-transitory computer readable medium includes various types of tangible storage media.
  • the non-transitory computer readable medium includes for example, a magnetic recording medium (for example, a flexible disk, a magnetic tape, or a hard disk drive), a magnetooptical recording medium (for example, a magnetic optical disc), a CD-ROM (Read Only Memory), a CD-R disc, a CD-R/W disc, a semiconductor memory (for example, a mask ROM, a PROM (Programmable ROM), an EPROM (Erasable PROM), a flash ROM, and a RAM (random access memory)).
  • a magnetic recording medium for example, a flexible disk, a magnetic tape, or a hard disk drive
  • a magnetooptical recording medium for example, a magnetic optical disc
  • CD-ROM Read Only Memory
  • CD-R disc Compact Only Memory
  • CD-R/W disc
  • the program may be supplied to the computer by various types of transitory computer readable media.
  • An example of the transitory computer readable medium includes an electrical signal, an optical signal, and an electromagnetic wave.
  • the transitory computer readable medium can supply the program to the computer via a wired communication path such as an electrical wire, an optical fiber, or the like or a wireless communication path.
  • a first effect is to prevent a delay on push distribution that occurs when the mobile terminal whose RRC state is the state wherein communication is possible transfers in the temporarily stopped state.
  • a second effect is to reduce a load on the network device.
  • this negotiation can be reduced because the change of the RRC state can be reduced in the exemplary embodiment of the present invention, and whereby, the load on the network device can be reduced.
  • a third effect is to reduce the power consumption of the mobile terminal.
  • the exemplary embodiment of the present invention can reduce the change of the RRC state. Therefore, the negotiation can also be reduced and whereby, the power consumption of the mobile terminal can be reduced.
  • a distribution sequence determination device which determines a distribution sequence for a push message transmitted to each of a plurality of terminals characterized in that
  • the distribution sequence is determined on the basis of whether each of a plurality of the terminals is in a state wherein communication is possible or in a temporarily stopped state so as to transmit the push message to each of a plurality of the terminals in the distribution sequence in which the terminal in the state wherein communication is possible is given priority over the terminal in the temporarily stopped state.
  • the distribution sequence is determined so as to transmit the push message to each of a plurality of the terminals in the distribution sequence in which among a plurality of the terminals in the state wherein communication is possible, the terminal whose allowable no communication period required for changing the state from the state wherein communication is possible to the temporarily stopped state is short is given priority over the terminal whose allowable no communication period is long.
  • the distribution sequence is determined so as to transmit the push message to each of a plurality of the terminals in the distribution sequence in which the highest priority is given to the terminal whose state is the state wherein communication is possible and whose allowable no communication period is not known.
  • the distribution sequence is determined so as to transmit the push message to each of a plurality of the terminals in the distribution sequence in which with respect to the terminal whose state is the state wherein communication is possible and whose allowable no communication period is not known, a length of the allowable no communication period is set to a predetermined length and the terminal whose allowable no communication period is short is given priority over the terminal whose allowable no communication period is long.
  • the allowable no communication period is an actual period.
  • the allowable no communication period is an estimated period.
  • the allowable no communication period is a period estimated on the basis of at least time at which the terminal ends the last communication.
  • the allowable no communication period is defined as a period obtained by subtracting a period of time from a start time of the non communication transition preparation period to a current time from the non communication transition preparation period that is a no communication period required for changing the state from the state wherein communication is possible to the temporarily stopped state.
  • a message distribution system including a distribution sequence determination device and a network device characterized in that
  • the distribution sequence determination device is the distribution sequence determination device described in any one of supplementary notes 1 to 9 and
  • the network device distributes a push message to a terminal according to a distribution sequence determined by the distribution sequence determination device.
  • the distribution sequence is determined on the basis of whether each of a plurality of the terminals is in a state wherein communication is possible or in a temporarily stopped state so as to transmit the push message to each of a plurality of the terminals in the distribution sequence in which the terminal in the state wherein communication is possible is given priority over the terminal in the temporarily stopped state.
  • a distribution sequence determination program which causes a computer to function as a distribution sequence determination device which determines a distribution sequence for a push message transmitted to each of a plurality of terminals characterized in that
  • the distribution sequence determination program causes the computer to function as the distribution sequence determination device which determines the distribution sequence on the basis of whether each of a plurality of the terminals is in a state wherein communication is possible or in a temporarily stopped state so as to transmit the push message to each of a plurality of the terminals in the distribution sequence in which the terminal in the state wherein communication is possible is given priority over the terminal in the temporarily stopped state.
  • a communication system composed of a plurality of mobile terminals which are operated by a user, a service server which cooperates with the mobile terminal and provides a service to the user, a push server which relays distribution of a push message to the mobile terminal from the service server, and a network device which transmits a message distribution request from the push server to the mobile terminal via a wireless network characterized in that
  • the mobile terminal is composed of
  • a terminal communication unit which communicates with the network device via the wireless network and transmits/receives data to/from the push server
  • a wireless state setting unit which monitors the terminal communication unit and sets an RRC state such as a high-speed communication state, a low-speed communication state, a temporarily stopped state, or the like to the terminal communication unit on the basis of a communication frequency of the mobile terminal or an instruction from the network device,
  • a push reception unit which distributes the push message to the terminal application specified in the push message when communication received by the terminal communication unit is the push message
  • the service server is composed of a service server function unit which cooperates with the terminal application which operates on the mobile terminal and provides the service to the user;
  • the push server is composed of
  • a push distribution unit which receives a request for the distribution of the push message to the mobile terminal that is requested by communication from the service server function unit, identifies the mobile terminal specified in the distribution request, and requests the distribution of the push message to the mobile terminal,
  • a distribution sequence control unit which controls the distribution sequence for the push message according to an RRC state of the mobile terminal
  • a terminal state determination unit which cooperates with the network device, acquires information of the RRC state of the mobile terminal, and notifies the distribution sequence control unit of the information, and
  • a server communication unit which transmits the push message to the mobile terminal in the sequence determined by the distribution sequence control unit to the network device;
  • the network device is composed of
  • a wireless communication unit which converts data transmitted by the server device usually connected by a wired network into data for the wireless communication network and relays it to the mobile terminal
  • a terminal wireless state control unit which monitors wireless communication to each mobile terminal, communicates with the wireless state setting unit of the mobile terminal, and changes the RRC state of the mobile terminal when the mobile terminal does not communicate with another mobile terminal for a predetermined time or a notification indicating the change of the RRC state is received from the wireless state setting unit of the mobile terminal, and
  • a terminal wireless state reporting unit which transmits information of the RRC state of the mobile terminal in response to a search request for the RRC state of the mobile terminal specified by the terminal state determination unit of the push server.
  • the distribution sequence control unit makes an inquiry about the RRC state of the mobile terminal to the terminal state determination unit,
  • the terminal state determination unit determines the network device managing the mobile terminal, acquires information of the RRC state of the mobile terminal from the terminal wireless state reporting unit of the network device, and sends information of the RRC state of the mobile terminal to the distribution sequence control unit,
  • the distribution sequence control unit instructs the server communication unit to distribute the push message to the mobile terminal before distributing the push message to another mobile terminal in the temporarily stopped state
  • the distribution sequence control unit instructs the server communication unit to distribute the push message after the distribution of the push message that is currently kept waiting for distribution
  • the server communication unit reads the push message in the sequence specified by the distribution sequence control unit and requests the network device to start to communicate with the mobile terminal associated with the push message, and
  • the push message is transmitted to the mobile terminal.
  • the distribution sequence control unit makes an inquiry about the RRC state of the mobile terminal to the terminal state determination unit;
  • the terminal state determination unit determines the network device managing the mobile terminal, acquires information of the RRC state of the mobile terminal from the terminal wireless state reporting unit of the network device, and sends information of the RRC state of the mobile terminal to the distribution sequence control unit;
  • the distribution sequence control unit when the distribution sequence control unit can acquire information of an allowable no communication period indicating a period of time from a current time to an end time of a no communication period at which the state is changed from a current state that is the state wherein communication is possible to the temporarily stopped state in addition to information about whether the RRC state of the mobile terminal is in the state wherein communication is possible or in the temporarily stopped state, in a case in which the RRC state of the mobile terminal is the state wherein communication is possible, the distribution sequence control unit instructs the server communication unit to distribute the push message to the mobile terminal whose RRC state is the state wherein communication is possible before distributing the push message to another mobile terminal in the temporarily stopped state and before distributing the push message which is distributed to another mobile terminal whose RRC state is the state wherein communication is possible and whose allowable no communication period is longer than that of the mobile terminal and
  • the distribution sequence control unit instructs the server communication unit to distribute the push message after the distribution of the push message that is currently kept waiting for distribution;
  • the server communication unit reads the push message in the sequence specified by the distribution sequence control unit, requests the network device to start to communicate with the mobile terminal associated with the push message, and
  • a communication system composed of a plurality of mobile terminals that are operated by a user, a service server which cooperates with the mobile terminal and provides a service to the user, a push server which relays distribution of a push message to the mobile terminal from the service server, and a network device which transmits a message distribution request from the push server to the mobile terminal via a wireless network characterized in that
  • the mobile terminal is composed of
  • a terminal communication unit which communicates with the network device via a mobile network and transmits/receives data to/from the push server
  • a wireless state setting unit which monitors the terminal communication unit and sets an RRC state such as a high-speed communication state, a low-speed communication state, a temporarily stopped state, or the like to the terminal communication unit on the basis of a communication frequency of the mobile terminal or an instruction from the network device,
  • a push reception unit which distributes the push message to the terminal application specified in the push message when communication received by the terminal communication unit is the push message
  • the service server is composed of a service server function unit which cooperates with the terminal application which operates on the mobile terminal and provides the service to the user;
  • the push server is composed of
  • a push distribution unit which receives a request for the distribution of the push message to the mobile terminal that is requested by the communication from the service server function unit, identifies the mobile terminal specified in the distribution request, and distributes the push message to the mobile terminal,
  • a distribution sequence control unit which controls the distribution sequence for the push message distributed by the push distribution unit according to an RRC state of the mobile terminal
  • a terminal state estimation unit which holds information of a period required for changing the state from the state wherein communication is possible to the temporarily stopped state for each type of the network to which the mobile terminal is connected in advance, cooperates with the network device, acquires a communication history of the mobile terminal, and estimates the RRC state
  • a server communication unit which transmits the push message to the mobile terminal in the sequence determined by the distribution sequence control unit to the network device;
  • the network device is composed of
  • a wireless communication unit which can convert data transmitted by the server device usually connected by a wired network into data for the wireless communication network, relay it to the mobile terminal, and transmit information of a time at which the relay of the communication to the specified mobile terminal occurs, and
  • a terminal wireless state control unit which monitors wireless communication to each mobile terminal, communicates with the wireless state setting unit of the mobile terminal, and changes the RRC state of the mobile terminal when the mobile terminal does not communicate with another mobile terminal for a predetermined time or a notification indicating the change of the RRC state is received from the wireless state setting unit of the mobile terminal.
  • the distribution sequence control unit makes an inquiry about the RRC state of the mobile terminal to a terminal state estimation unit;
  • the terminal state estimation unit determines the network device managing the mobile terminal and acquires time of the last communication with the mobile terminal managed by the wireless communication unit of the network device and a type of the networks to which the mobile terminal is connected,
  • the terminal state estimation unit acquires information of a no communication transfer time that is a time required for changing the state from the state wherein communication is possible to the temporarily stopped state on the basis of the type of the network to which the mobile terminal is connected, compares it with a no communication elapsed time obtained by subtracting the time of the last communication with the terminal from a current time, determines that the state is a communication state when the no communication elapsed time is shorter than the no communication transfer time, determines that the state is the temporarily stopped state when the no communication elapsed time is equal to or grater than the no communication transfer time, and notifies the distribution sequence control unit of a result;
  • the distribution sequence control unit instructs the server communication unit to distribute the push message to the mobile terminal before distributing the push message to another mobile terminal in the temporarily stopped state
  • the distribution sequence control unit instructs the server communication unit to distribute the push message after the distribution of the push message that is currently kept waiting for distribution;
  • the server communication unit reads the push message in the sequence specified by the distribution sequence control unit and requests the network device to start to communicate with the mobile terminal associated with the push message,
  • the distribution sequence control unit makes an inquiry about the RRC state of the mobile terminal to the terminal state estimation unit;
  • the terminal state estimation unit determines the network device managing the mobile terminal and acquires the time of the last communication with the mobile terminal managed by the wireless communication unit of the network device and the type of the networks to which the mobile terminal is connected,
  • a no communication transfer time that is a time required for changing the state from the state wherein communication is possible to the temporarily stopped state on the basis of the type of the network to which the mobile terminal is connected, compares it with a no communication elapsed time obtained by subtracting the time of the last communication with the terminal from the current time, determines that the state is a communication state when the no communication elapsed time is shorter than the no communication transfer time and notifies the distribution sequence control unit of a value obtained by subtracting the no communication elapsed time from the no communication transfer time as the allowable no communication time, determines that the state is the temporarily stopped state when the no communication elapsed time is equal to or longer than the no communication transfer time, and notifies the distribution sequence control unit of a result;
  • the distribution sequence control unit when the distribution sequence control unit can acquire information of an allowable no communication period indicating a period of time from a current time to an end time of a no communication period at which the state is changed from a current state that is the state wherein communication is possible to the temporarily stopped state in addition to information about whether the RRC state of the mobile terminal is in the state wherein communication is possible or in the temporarily stopped state, in a case in which the RRC state of the mobile terminal is the state wherein communication is possible, the distribution sequence control unit instructs the server communication unit to distribute the push message to the mobile terminal whose RRC state is the state wherein communication is possible before distributing the push message to another mobile terminal in the temporarily stopped state and before distributing the push message which is distributed to another mobile terminal whose RRC state is the state wherein communication is possible and whose allowable no communication period is longer than that of the mobile terminal and
  • the distribution sequence control unit instructs the server communication unit to distribute the push message after the distribution of the push message that is currently kept waiting for distribution;
  • the server communication unit reads the push message in the sequence specified by the distribution sequence control unit, requests the network device to start to communicate with the mobile terminal associated with the push message and
  • the present invention can be applied to an application in which the distribution of a push message to a mobile terminal is controlled from a server provided on a network.

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